“Improvement of a Technique ECG - Diagnostics Cardiovascularheart Diseases at Using of a Congruence Normal Filtration”. 2009. Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, no. 38 (March): 20-23. https://doi.org/10.20535/RADAP.2009.38.20-23.